(PHP 3 >= 3.0.3, PHP 4, PHP 5)
ucwords -- 
     Uppercase the first character of each word in a string
    
Description
string 
ucwords ( string str )
     Returns a string with the first character of each word in
     str capitalized, if that character is
     alphabetic.
    
     The definition of a word is any string of characters
     that is immediately after a whitespace (These  are:
     space, form-feed, newline, carriage return, horizontal tab,
     and vertical tab).
    
     
Example 1. ucwords() example 
<?php $foo = 'hello world!'; $foo = ucwords($foo);             // Hello World! 
  $bar = 'HELLO WORLD!'; $bar = ucwords($bar);             // HELLO WORLD! $bar = ucwords(strtolower($bar)); // Hello World! ?>
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    Note: This function is
binary-safe.
     See also strtoupper(),
     strtolower() and ucfirst().